Massachusetts Dams
1,291 dams tracked by the National Inventory of Dams
Total Dams
1,291
High Hazard
319
24.7%
Poor / Unsatisfactory
336
Average Age
112 yrs
Hazard Classification
High319 (24.7%)
Significant616 (47.7%)
Low356 (27.6%)
Condition Assessment
Satisfactory441 (34.2%)
Fair464 (35.9%)
Poor / Unsatisfactory336 (26.0%)
Not Rated50 (3.9%)
Federal
15
State
211
Local
585
Private
451
Tallest Dams
- Cobble Mountain Reservoir Dam245 ft
- Quabbin Winsor Dam170 ft
- Littleville Dam164 ft
- Bear Swamp - North Dike 155 ft
- Knightville Dam150 ft
High Hazard Dams
Poor Condition Dams
All Dams in Massachusetts
Showing 151–175 of 319
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Laurel Lake Dam Berkshire County | 12 | — | High | Satisfactory |
| Leahey (Upper) Reservoir Dam and Dike Berkshire County | 57 | 1965 | High | Satisfactory |
| Leaping Well Reservoir Dam Hampshire County | 29 | 1890 | High | Satisfactory |
| Lester G. Ross Dam Worcester County | 46 | 1974 | High | Satisfactory |
| Linwood Pond Dam Worcester County | 18 | 1865 | High | Satisfactory |
| Littleville Dam Hampden County | 164 | 1965 | High | Not Available |
| Lost Lake Dam Middlesex County | 10 | 1910 | High | Satisfactory |
| Lovell Reservoir Dam Worcester County | 84 | 1929 | High | Fair |
| Lovell Reservoir Dike Worcester County | 27 | 1929 | High | Satisfactory |
| Lowell Reservoir Dam Middlesex County | 26 | 1872 | High | Fair |
| Lower Highland Lake Dam Hampshire County | 29 | 1852 | High | Satisfactory |
| Lower Merino Pond Dam Worcester County | 24 | 1850 | High | Fair |
| Lower Naukeag Lake Dam Worcester County | 14 | 1900 | High | Fair |
| Lower Root Reservoir Dam Berkshire County | 34 | — | High | Satisfactory |
| Lower Stoneville Pond Dam Worcester County | 15 | 1904 | High | Fair |
| Lower Van Horn Reservoir Dam Hampden County | 52 | 1848 | High | Satisfactory |
| Ludlow Reservoir Dam Hampden County | 19 | 1877 | High | Satisfactory |
| Lynde Brook Reservoir Dam Worcester County | 61 | 1876 | High | Satisfactory |
| Lynde Brook Reservoir Dike Worcester County | 17 | 1876 | High | Fair |
| Main Street Dam Middlesex County | 18 | 1882 | High | Poor |
| Manchaug Pond Dam Worcester County | 28 | 1836 | High | Fair |
| Manchester Pond Reservoir Dam Bristol County | 28 | 1963 | High | Fair |
| Manchester Pond Reservoir East Dike Bristol County | 12 | 1963 | High | Poor |
| Manchester Pond Reservoir South Dike Bristol County | 16 | 1963 | High | Poor |
| Marcalus Manufacturing Company Dam Hampshire County | 27 | — | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.